Review on 🔍 WOWOONE MQ-135 Starter Kit for Detection Module by Mark Adlesh

These sensors are decent hardware devices once you understand how to use them. There was absolutely no support, not even a website address to download user manuals or other documents. I searched the net until I found what I needed for ONE of the sensors (CO sensor). What a waste of time. It would be helpful if the seller could provide user manuals, datasheets or something similar. to help us understand how to wire these things up, turn them on, and interpret their output.